Rith, Liberated Primeval

It doesn’t matter whether a creature, spell, or ability you control deals the excess damage, only that excess damage was dealt at some point during the turn. For example, if a 4/4 creature an opponent controls is dealt 2 damage by a spell you control and later that turn is dealt 3 damage by a spell another player controls, Rith’s ability will trigger.

Rith’s ability will trigger as long as an opponent controlled the creature as excess damage was dealt to it, even if the creature is no longer on the battlefield or you control it at the end of the turn.

If a permanent has more than one ward ability, the abilities trigger individually. The spell or ability will be countered if either of the ward costs aren’t paid.